Error Indication Handling on UPF

UPF, on receiving Error Indication, initiates a PFCP Session Report Request with Error Indication Report that includes remote F-TEID containing TEID and GTP-U Peer address.

  • For PGW-U, Error Indication message is sent or received over S5u.

  • For SAEGW-U, Error Indication message is sent or received over S1u.

  • For SGW-U, Error Indication message is sent and received over S1u and S5u.

UPF generates Error Indication with TEID and GTP-U Peer Address towards a peer when a data packet is received with TEID for which a session or bearer doesn't exist.